Red Hat Security Advisory: General availability of the satellite/iop-puptoo-rhel9 container image
Red Hat Lightspeed in Satellite analyzes system health and configuration by applying predefined rules to a small set of local data, such as installed packages, running services, and configuration settings. When you install Red Hat Lightspeed in Satellite locally, you can generate Red Hat Lightspeed recommendations without sending system data to Red Hat services.
AI Analysis
Technical Summary
The vulnerability CVE-2025-66418 in the urllib3 Python library allows a remote attacker to trigger a denial of service by exploiting an unbounded decompression chain in HTTP responses. This causes the client system to consume excessive CPU and memory resources, making applications unresponsive. This issue is present in Red Hat Satellite 6.18's Red Hat Lightspeed component, which analyzes system health locally. The advisory also includes CVE-2025-66471 and CVE-2026-21441 but does not provide details on those. Red Hat has published an advisory (RHSA-2026:14877) announcing the general availability of the satellite/iop-puptoo-rhel9 container image but does not list any fixes for these vulnerabilities. The vulnerability is classified under CWE-770 (Allocation of Resources Without Limits or Throttling) and CWE-409 (possible race condition). No CVSS score is provided by Red Hat, and no known exploits are reported in the wild.
Potential Impact
Exploitation of CVE-2025-66418 can lead to denial of service by exhausting CPU and memory resources on the client system running Red Hat Lightspeed in Satellite. This results in service disruption and unresponsiveness of affected applications. The impact is limited to resource consumption and does not affect confidentiality or integrity. No known active exploitation has been reported. The presence of additional CVEs suggests multiple security issues in the affected component, but specific impacts for those are not detailed.
Mitigation Recommendations
No official fix or patch is currently available for the affected Red Hat Satellite 6.18 version. Users should follow Red Hat Satellite documentation for installation and configuration of Red Hat Lightspeed. Since the vulnerability involves resource exhaustion via HTTP responses, consider limiting exposure to untrusted or malicious HTTP servers where possible. Monitor Red Hat advisories for updates or patches addressing these vulnerabilities. Customers with Red Hat Technical Account Managers (TAM) can seek direct guidance. No vendor advisory states that no action is required or that the issue is already mitigated.
Red Hat Security Advisory: General availability of the satellite/iop-puptoo-rhel9 container image
Description
Red Hat Lightspeed in Satellite analyzes system health and configuration by applying predefined rules to a small set of local data, such as installed packages, running services, and configuration settings. When you install Red Hat Lightspeed in Satellite locally, you can generate Red Hat Lightspeed recommendations without sending system data to Red Hat services.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2025-66418 in the urllib3 Python library allows a remote attacker to trigger a denial of service by exploiting an unbounded decompression chain in HTTP responses. This causes the client system to consume excessive CPU and memory resources, making applications unresponsive. This issue is present in Red Hat Satellite 6.18's Red Hat Lightspeed component, which analyzes system health locally. The advisory also includes CVE-2025-66471 and CVE-2026-21441 but does not provide details on those. Red Hat has published an advisory (RHSA-2026:14877) announcing the general availability of the satellite/iop-puptoo-rhel9 container image but does not list any fixes for these vulnerabilities. The vulnerability is classified under CWE-770 (Allocation of Resources Without Limits or Throttling) and CWE-409 (possible race condition). No CVSS score is provided by Red Hat, and no known exploits are reported in the wild.
Potential Impact
Exploitation of CVE-2025-66418 can lead to denial of service by exhausting CPU and memory resources on the client system running Red Hat Lightspeed in Satellite. This results in service disruption and unresponsiveness of affected applications. The impact is limited to resource consumption and does not affect confidentiality or integrity. No known active exploitation has been reported. The presence of additional CVEs suggests multiple security issues in the affected component, but specific impacts for those are not detailed.
Mitigation Recommendations
No official fix or patch is currently available for the affected Red Hat Satellite 6.18 version. Users should follow Red Hat Satellite documentation for installation and configuration of Red Hat Lightspeed. Since the vulnerability involves resource exhaustion via HTTP responses, consider limiting exposure to untrusted or malicious HTTP servers where possible. Monitor Red Hat advisories for updates or patches addressing these vulnerabilities. Customers with Red Hat Technical Account Managers (TAM) can seek direct guidance. No vendor advisory states that no action is required or that the issue is already mitigated.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:14877
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-66471","CVE-2026-21441"]
Threat ID: 6a16096ce29bf47b506334d6
Added to database: 05/26/2026, 20:58:20 UTC
Last enriched: 08/10/2026, 17:53:07 UTC
Last updated: 09/15/2026, 01:37:22 UTC
Views: 60
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